A large beetle that makes a loud humming or buzzing sound when it flies, particularly species in the Scarabaeidae family.
From Scottish 'dorr' (vibration, resonant sound) combined with 'beetle,' literally describing the audible characteristic of these insects.
These beetles produce sound as a byproduct of their wing vibrations—what we perceive as a scary buzzing is just physics, yet it's given them a name that humans have used for centuries.
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